Brush structure for vacuum cleaner

ABSTRACT

A brush structure includes a rotation bar, a plurality of brush strips, a plurality of fixing blocks, and a driving block mounted on the rotation bar to rotate the rotation bar. Thus, the helical groove is extended through the whole length of each of the two arc-shaped plates of the rotation bar, so that each of the two brush strips is extended through the whole length of each of the two arc-shaped plates of the rotation bar without interruption, thereby enhancing the cleaning effect of each of the two brush strips.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a brush structure, and moreparticularly to a brush structure for a vacuum cleaner.

2. Description of the Related Art

A conventional brush structure for a vacuum cleaner in accordance withthe prior art shown in FIGS. 7 and 8 comprises a tube 50 having two endseach formed with two symmetrical grooves 52, four brush strips 60 eachmounted in a respective one of the grooves 52 of the tube 50 and eachhaving a surface provided with a plurality of bristles 61, and twosupport blocks 70 mounted in the two ends of the tube 50 to preventdeformation of the tube 50. The grooves 52 of the tube 50 are separatedfrom each other by a separation zone 51. Each of the brush strips 60 hastwo sides each formed with an insertion groove 62 (see FIG. 7A) forinsertion of a side of the respective groove 52 of the tube 50 as shownin FIG. 8A.

However, the brush strips 60 are separated by the separation zone 51,thereby decreasing the cleaning effect of the brush strips 60. Inaddition, the conventional brush structure needs to provide four brushstrips, thereby increasing costs of fabrication and assembly.

SUMMARY OF THE INVENTION

The present invention is to mitigate and/or obviate the disadvantage ofthe conventional brush structure for a vacuum cleaner.

The primary objective of the present invention is to provide a brushstructure for a vacuum cleaner.

Another objective of the present invention is to provide a brushstructure, wherein the helical groove is extended through the wholelength of each of the two arc-shaped plates of the rotation bar, so thateach of the two brush strips is extended through the whole length ofeach of the two arc-shaped plates of the rotation bar withoutinterruption, thereby enhancing the cleaning effect of each of the twobrush strips.

A further objective of the present invention is to provide a brushstructure that only needs to provide two brush strips, therebydecreasing costs of consumption.

A further objective of the present invention is to provide a brushstructure, wherein the rotation bar has a tubular shape, therebydecreasing the whole weight of the brush structure.

In accordance with the present invention, there is provided a brushstructure, comprising:

a rotation bar including a plurality of arc-shaped plates combined witheach other, each of the arc-shaped plates of the rotation bar having twosides each formed with a helical rim, so that a plurality of helicalgrooves are formed between the helical rims of the arc-shaped plates ofthe rotation bar;

a plurality of brush strips each mounted in a respective one of thehelical groove of the rotation bar;

a plurality of fixing blocks each mounted in the rotation bar betweenthe arc-shaped plates; and

a driving block mounted on the rotation bar to rotate the rotation bar.

Further benefits and advantages of the present invention will becomeapparent after a careful reading of the detailed description withappropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded perspective view of a brush structure inaccordance with the preferred embodiment of the present invention;

FIG. 1A is a partially enlarged view of the brush structure as shown inFIG. 1;

FIG. 1B is a partially enlarged view of the brush structure as shown inFIG. 1;

FIG. 2 is a partially perspective assembly view of the brush structureas shown in FIG. 1;

FIG. 3 is a partially perspective assembly view of the brush structureas shown in FIG. 1;

FIG. 3A is a partially enlarged view of the brush structure as shown inFIG. 3;

FIG. 4 is a perspective assembly view of the brush structure as shown inFIG. 1;

FIG. 5 is a partially perspective assembly view of a brush structure inaccordance with another embodiment of the present invention;

FIG. 6 is a perspective assembly view of the brush structure inaccordance with another embodiment of the present invention;

FIG. 7 is an exploded perspective view of a conventional brush structurein accordance with the prior art;

FIG. 7A is a partially enlarged view of the conventional brush structureas shown in FIG. 7;

FIG. 8 is a perspective assembly view of the conventional brushstructure as shown in FIG. 7; and

FIG. 8A is a partially enlarged view of the conventional brush structureas shown in FIG. 8.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially to FIGS. 1–4, a brush structurein accordance with the preferred embodiment of the present invention ismounted on the air inlet of a vacuum cleaner, and can be rotated duringthe dusting process to brush and clear the face to be cleaned.

The brush structure comprises a rotation bar 1, two brush strips 20, aplurality of fixing blocks 30, and a driving block 40.

The rotation bar 1 has a tubular shape and includes two oppositearc-shaped plates 10 combined with each other. Each of the twoarc-shaped plates 10 of the rotation bar 1 has two sides each formedwith a helical rim 100, so that a helical groove 11 is formed betweenthe helical rims 100 of the two arc-shaped plates 10 of the rotation bar1. Thus, the rotation bar 1 is formed with two helical grooves 11. Inaddition, the helical groove 11 is extended through a whole length ofeach of the two arc-shaped plates 10 of the rotation bar 1.

Each of the two brush strips 20 has a helical shape and is mounted inthe respective helical groove 11 of the rotation bar 1. Each of the twobrush strips 20 has two sides each formed with an insertion groove 22(see FIG. 1A) for insertion of the respective helical rim 100 of each ofthe two arc-shaped plates 10 of the rotation bar 1 as shown in FIG. 3A.Each of the two brush strips 20 has a surface provided with a pluralityof bristles 21. In addition, each of the two brush strips 20 is extendedthrough a whole length of each of the two arc-shaped plates 10 of therotation bar 1.

Each of the fixing blocks 30 is mounted in the rotation bar 1 betweenthe two arc-shaped plates 10. Each of the fixing blocks 30 has two sideseach fixed on the respective arc-shaped plate 10 of the rotation bar 1in a spot soldering manner, so that the two arc-shaped plates 10 of therotation bar 1 are combined to form the tubular shaped rotation bar 1.Each of the fixing blocks 30 is formed with a plurality of through holes31 for mounting a washer (not shown) so as to balance the center ofgravity of the rotation bar 1, thereby preventing the rotation bar 1from producing vibration during rotation.

The driving block 40 is mounted on the rotation bar 1 and driven by abelt (not shown), so that the driving block 40 is driven by the belt torotate the rotation bar 1. The driving block 40 has an end formed with amounting portion 41 mounted in an end of the rotation bar 1, so that thedriving block 40 is secured on the rotation bar 1. The mounting portion41 of the driving block 40 has a periphery formed with two radiallyopposite recesses 42 (see FIG. 1B), and each of the two brush strips 20has an end inserted into the respective recess 42 of the mountingportion 41 of the driving block 40.

Accordingly, the helical groove 11 is extended through the whole lengthof each of the two arc-shaped plates 10 of the rotation bar 1, so thateach of the two brush strips 20 is extended through the whole length ofeach of the two arc-shaped plates 10 of the rotation bar 1 withoutinterruption, thereby enhancing the cleaning effect of each of the twobrush strips 20. In addition, the brush structure only needs to providetwo brush strips 20, thereby greatly decreasing costs of consumption.Further, The rotation bar 1 has a tubular shape, thereby decreasing thewhole weight of the brush structure.

Referring to FIGS. 5 and 6, a brush structure in accordance with anotherembodiment of the present invention is shown, wherein the rotation bar1A includes three arc-shaped plates 10A combined with each other, sothat the rotation bar 1A is formed with three helical grooves 11A formounting three brush strips 20A each having a surface provided with aplurality of bristles 21A. Thus, the rotation bar 1A is provided withthree brush strips 20A arranged in a helical manner. In addition, eachof the fixing blocks 30A has three lugs 32A for fixing the threearc-shaped plates 10A.

Although the invention has been explained in relation to its preferredembodiment(s) as mentioned above, it is to be understood that many otherpossible modifications and variations can be made without departing fromthe scope of the present invention. It is, therefore, contemplated thatthe appended claim or claims will cover such modifications andvariations that fall within the true scope of the invention.

1. A brush structure, comprising: a rotation bar comprising a pluralityof arc-shaped plates combined with each other, each of the arc-shapedplates comprising two sides each formed with a helical rim, so that aplurality of helical grooves are defined between the helical rims; aplurality of brush strips each installed in a related one of the helicalgrooves of the rotation bar and formed with two sides each defining agroove for receiving the related helical rim of each of the arc-shapedplates of the rotation bar; a plurality of fixing blocks each installedin the rotation bar between the arc-shaped plates; and a driving blockmounted on the rotation bar in order to rotate the rotation bar.
 2. Abrush structure, comprising: a rotation bar comprising a plurality ofarc-shaped plates combined with each other, each of the arc-shapedplates comprising two sides each formed with a helical rim, so that aplurality of helical grooves are defined between the helical rims; aplurality of brush strips each installed in a related one of the helicalgrooves of the rotation bar; a plurality of fixing blocks each installedin the rotation bar between the arc-shaped plates; and a driving blockmounted on the rotation bar in order to rotate the rotation bar andformed with a periphery defining a plurality of recesses each forreceiving an end of a related one of the brush strips.